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6 papers · 2 filters
Molecular Clouds: Internal Properties, Turbulence, Star Formation and Feedback
Jonathan C. Tan, Suzanne N. Shaske, Sven Van Loo
All stars are born in molecular clouds, and most in giant molecular clouds (GMCs), which thus set the star formation activity of galaxies. We first review their observed properties…
Kiloparsec-Scale Simulations of Star Formation in Disk Galaxies. I. The unmagnetized and zero-feedback limit
Sven Van Loo, Michael J. Butler, Jonathan C. Tan
We present hydrodynamic simulations of the evolution of self-gravitating dense gas on scales of 1 kiloparsec down to < parsec in a galactic disk, designed to study dense clump form…
Kiloparsec-Scale Simulations of Magnetised Molecular Clouds in Disk Galaxies
Sven Van Loo, Michael J. Butler, Jonathan C. Tan +1
We present simulations of the evolution of self-gravitating dense gas on kiloparsec-size scales in a galactic disk, designed to study dense clump formation from giant molecular clo…
The Galactic Census of High- and Medium-mass Protostars. II. Luminosities and Evolutionary States of a Complete Sample of Dense Gas Clumps
Bo Ma, Jonathan C. Tan, Peter J. Barnes
(Abridged) The Census of High- and Medium-mass Protostars (CHaMP) is the first large-scale (280 degree<l<300 degree, -4 degree<b<2 degree), unbiased, sub-parsec resolution survey o…
High-dynamic-range extinction mapping of infrared dark clouds: Dependence of density variance with sonic Mach number in molecular clouds
Jouni Kainulainen, Jonathan C. Tan
Measuring the mass distribution of infrared dark clouds (IRDCs) over the wide dynamic range of their column densities is a fundamental obstacle in determining the initial condition…
A Virialized Filamentary Infrared Dark Cloud
Audra K. Hernandez, Jonathan C. Tan, Jouni Kainulainen +4
The initial conditions of massive star and star cluster formation are expected to be cold, dense and high column density regions of the interstellar medium, which can reveal themse…